<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <!--关键代码-->
    <script th:src="@{/webjars/jquery/3.2.1/dist/jquery.min.js}"></script>
    <script th:src="@{/webjars/bootstrap/4.3.1/js/bootstrap.min.js}"></script>
    <link rel="stylesheet" th:href="@{/webjars/bootstrap/4.3.1/css/bootstrap.min.css}"/>
    <link type="text/css" rel="stylesheet" th:href="@{/static/css/style.css}">
    <title>Title</title>
</head>
<body>
<link rel="stylesheet" href="static/css/index.css">
<h1>Hello,Thymeleaf</h1>
<img id="img1" alt="看到我说明图片挂了" th:src="@{/static/imgs/boy.jpg}" title="帅哥一枚"
     width="10%" height="10%" class="rounded‐circle">
<button id="btn1" class="btn btn‐info">Click Me!</button>
<div id="div1"></div>
<script type="text/javascript">
    $("#btn1").click(function(){
        $("#img1").attr({"src":"[[@{/}]]/static/imgs/girl.jpg", "title":"小姐姐一名"});
        let val = $("#div1").html();
        if(val.length == 0)
            $("#div1").html("被点出来了...").css({"color":"silver", "font‐size": "24px"});
    else if(val != '')
            $("#div1").html("");
    });
</script>
</body>
</html>